Sorry for the confusion. UniPi had removed the UniPian image and so I removed UniPi Neuron for CODESYS from the CODESYS store. I have since been working with UniPi and a new Image for UniPian was released today.
The UniPian image will work with CODESYS 3.5.12.x and the release UniPi Neuron for CODESYS.
3S have also released a new Version of CODESYS which requires a rebuild and retest of UniPi Neuron for CODESYS before the product can be re-enabled in the CODESYS store. I anticipate that this will be released by 17/1/19. I will post here when the new version is available.